Excavating-machine.



H. J. BARNHART. EXCAVA'HNG MACHINE.

APPLICATION FILED FEB. 7. 19m.

Patented A r; 29, E9119.

2 SHEETS SHEET l.

H J. BARNHART.

EXCAVATING MACHINE.

APPLICATION HLED FEB.'7. 19H.

Patented Am. 29, 1919.

Lwmw,

.kpplicat'lor. marl 'J,

To all wfwm it a rzczy come 1n known that L HA8 J. mmbzimm' en 01" theUnlied 6mm reauhngz at 1 in the county 013 Bit" nylon 2 1d tzvm haveinvented certain new and use mvemmts in Emavwting-fi "a'chimes; dclm'eLhe following "is be a full, and exact descriytion 01 the have as willenable others skilled in 1 it nppelmins "3 main mt 1 35;

cm'z'ies housg which is so permit the hm N11 At one end of the bodyzurivd n. bOom Salim big pm'tmi and which means of tha mtaizion 01Llight 01' left. b90211 per-arm Elm-1kg mow l extremity a. dipper m551love vices fur pmjeating and Pen penmm. and mi, outer end of thearmnmchines (.5 constru memfi: bodv raisin-2' maria:

mounted 11pm suitably 001mm be aciuafei while he 3,122 of fix? Y p "armme 01* an engine T331.

My Sim 1 lilies i0 1 class 11 and pens/e W .h the separate a gines ormeters for driving L rear referred $0,, and i0 furnish cons! b" whichithe 110011) the sippetarn ing mes .ism in" the: devices mi and ldweiingthe Lpper may con and at will be 'indepe l neatly 01- nnulwns- 01151}!open "9 n xgleengine 01' 111-01301 moving in but one (151 fion. Myinventioi'i cl in also relates cei'hin detaiw 0: mnsrruction ii's ferwmdhereinafter described and 'wmted out in the claims To operate the shovel12 three principal instrumentalities are requisite, via. means forprojecting and pressing the teeth or cutting,' edge of the dipper intothe earth to be excavated and for retracting the dipper and dipper-arm;means for hoisting the dipper to the desired-height, and means forswinging the dipper to the right or left. to the point where itscontents are to be dis-1- charged.

lle'lerring first to the gears for svv'inging the body of the machine,together with the boom, the dipper handle and the dipper, which gears,in the present construction, lie nearest to the engine: fpon the shaftof the engine 10 is a geaewheel 13 in mesh with a gear-wheel 14 upon oneend of a shaft it which carries at its other end a pinion 15. The shaftA together with the shafts geared to and driven by the shaft 11 arejournaled upon the side-inen'ibers ot a stout cast frame 13 mounted uponand secured to the deck or platform 8. The pinion 15 is in mesh withgear\\'liecl lo fixed upon the shaft 1." upon which is a double clutch,illustrated in Fig. l. i krl this form oi clutch is repeated in. thismachine a single illustration and description will sullice to" all. 18is a collar rigidly fixed upon the shaft 17. At each side of the collar18 is a frictionovhecl l9, loose upon the shaft 17. The flanges or"these friction wheels overlap and are adapted to l tinnally engage the:tlz-rnges 20 oil? the frictionmembers 21 rigidly secured to the shaftll. lnterposed between the inner ends of the hubs 19 of the wheels 19and the collar 18 are pairs of sleeves or collars 22, the meeting facesof which are wedgedike or carnshaped, as clearly indicated in Fig. :l.The inner member of each pair abuts against the collar 18, the outermembers abutting against the inner ends of the hubs 19. The outercam-shaped members are provided} with arms the extremities of which aresecured to the deck of themachine or to some other stationary part insuch manner that, they may be slightly moved transversely. The innercam-members are provided. with arms extending upwardly, each of thesearms being provided with a rod 25 leading to a lerer.,-not sliow. .1-,--

within convenient reach the operator. It Wlll be seen that the movementof either of the arms 2t will by the wedge-like action fixed upon theshaft at.

ll'hen either mesh with gear-wheels the former being capable of slighttransverse movement upon the latter when the clutch mechanism instdescribed is actuated. The shaft of tin gears-wheels it; carries a pairof beveled pinions :29 engaged with opposite sides of a beveled gear 150the vertical shaft of which, 31, carries at its lower end a pinion inmesh with the teeth of the circular rack It will now be seen that whenthe appropriate pair of friction members 19-20 are thrown into contactthe pinion 32 will, through the shaft 31 and the gears 29--30, be causedto traverse the circular peripheral path of the rack 5. thus causing thebody of the machine to swing upon the center in either direction as maybe desired.

Referring next to the part of the apparatus designed to raise and lowerand govern the height of the shovel 12: A cable 33 connected in theusual or any preferred manner with the shovel is threaded around pulleys3. at the shovel and 35 at the tip of the boom and leads to and arounddrum 3b. This drum is loose upon shaft 37, journaled on frame B, whichshaft is driven by gear-J38, in mesh with the gear 16. The drum 36carries a f1'l( 'tl()ll-l1ltfllilljl 39 simi lar to the wheel 19 (lli-il) and uh coacts with a companion 'l'llC'ilOll similar to the wheel20- it, (his;

Loose upon the shaft 37 are collars 31' like the collars 22. Fig. -3l,and which s n to actuate the clutch members i-lfi -o a manner which willnow be understood without further explanation. T his clutchinec-hanis nis the same as that already described except that, it requires noreversing mechanism and no disengaging springs like the springs for thereason that power is applied only in the lifting; operation, the reversemovcincnt being obtained by the weight attached to the cable lit will beI understood without illustration that the collars 37 are controlled byarmslike. the arms 23--2-fl, one of the arms being suitably connectedwith a controlling lever within convenient reach of the operator. Thegear 38 being in motion and the clutch members 39-l0 being engaged, thecable 33 is wound upon the drum lifting the shovel to the describedheight. As the shovel is lifted the body of the machine is swung to theright or left as may be desired through the swinging mechanismhereinbetore described. The releasing of the clutch 39l-0 permits theshovel to fall to its point of attack.

Coming now to the devices for projecting and retracting the dipper-arm11, it will be understood that the operation of a mechanism forthrusting and withdrawing a dipper-armniountedupon a verticallyadjustable boom by means of a remote engine, instead of by means of anen ine mounted, directly upon a Upp mac mle mesh mea Oil

l throng. less 1 1% su'i' esir 1L m shuc't Pet 6 seen Pix-9.

211v} the ii we'memsa c-es new to be describ' nted 1.1130

pmv c:

i! ale 1 and 10 si m "*9.

mmimi m r 4 menu pr sen hit um lbu i 7 ms.

110k awed upnx owe!- led U de tip 0' the u-nb (ms we 1n I climb-1 Uronment mm on frame The. shaft 5 clutch mesh.

m0 p betwsen w arm. re buom 1G mm'rhin 30 journa 5 boom.

i and f dip} Julie, e. 1*; we on. the hzmeiie, maxim-N on. the boom andeperzitiveiy engaged ivitii the rack, :1 shaft horizontniiy mounted. andupon which the inset oi the b00111 is pii'eieii, gears on said shaft,and driving comm time intei'iiieiiate and operzit-ively CGDIlQk-efiiwith said two gears conebined. with a, nonmeveitsing engine and 001%eeetioiis beiweezi the engine and said gears 0n the pive'bshaft ifOi.driving such gears in either ciireeiion.

6. in an excavating meieiiine, a ii0i'izoninliy inimitable body, anengine mounted at one end of said body, a boom. having its iieei pivotedat iihe other end of said body, a iierizoniaily mounted shaft formingsuch pivot, means for the vertical adjustment of the beam upon saidpivot, 21 (iippei'mi'ni, a shovel carried by said arm, gears upon theheme ioi' i'eeiprimit-img the dipper-arm, gears upen mid pivet-simftoperative ceniiections between said two gears, of gears between theengine and the gears on said pivot-shaft, and means operable by saidtrain for hoisting said movei and for rotating said body.

I, in an excavating machine, a horizoiituiiy rotatable body, an enginemounted at one end of said. body, a beom having its heel pivoted iii themike end 01 said body,

V1; iiiiieiiiiiie a beam a a horizontal shaft forming such pivei, meansfor the verticei adjustment of the boom upon said pivot, a dipper-arm, ashovel carried by said arm, gears upon the boom for reciprocating thedipper-arm,

119ml said pivos-shaft operative e011- iiections between said ewe gears,a train 0f between the engine and the gears on said pivet-shait, meansOperable by said train for hoisting said shovel, and mews iei'i'eiiiiting said body, combined with m veiisibie elutelvmeehanisms "forconnecting wiih and disconnecting from said ilffibili the said twe gearsand said hoisting and said rotating means. i r

8. An excavating machine iii the die sei'ibed character, eempi'ising atruck, :1 herizoniaiiy i'evoiubi-e beciy upon the *uruek, amen-reversing motor at one end 01? the 00 a beam the ether end of burly,

boom, gee for meeting ilrie befiy, gears for mg ciubehenechenism seizigears ier pre- -jeeting and retracting the iiilQPBil iflHl ineiuciing aiiei'izemaii shaft upon which the heel of the booinis hinged.

in testimony wherein I efiizi my signature in presence e2? twoWitnesses.

HARRY J. BARNHART.

Viitnesses Y C. A. OWENS, I

C. Melisa-.-

